Method for coking wastewater degradation and synchronous power generation by taking coking active bacterium as biocatalyst

A biocatalyst and coking wastewater technology, applied in biochemical fuel cells and other directions, can solve the problem of high energy consumption for aeration, and achieve the effects of low treatment efficiency, low investment, and both environmental and ecological benefits.

Inactive Publication Date: 2016-01-27
TAIYUAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, it does not need to consume energy, and at the same time converts the chemical energy in the wastewater into ele...

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  • Method for coking wastewater degradation and synchronous power generation by taking coking active bacterium as biocatalyst
  • Method for coking wastewater degradation and synchronous power generation by taking coking active bacterium as biocatalyst
  • Method for coking wastewater degradation and synchronous power generation by taking coking active bacterium as biocatalyst

Examples

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Embodiment 1

[0067] A method for synchronously generating electricity by using coking active bacteria as a biocatalyst to degrade coking wastewater by microbial fuel cells, the method is carried out according to the following steps.

[0068] 1. Electrochemical domestication of MFC phenol and glucose co-substrate system: Activated sludge was taken from the aerobic pool and anaerobic pool of the wastewater treatment workshop of a coking plant, and a dual-chamber microbial fuel cell device was built. The anode compartment used a phenol and glucose co-substrate system , the cathode chamber is potassium ferricyanide solution, the cathode is 20% platinum-carrying carbon cloth, maintain a constant temperature of 35°C, connect an external constant external resistance of 1000Ω, and measure the external voltage regularly. The battery adopts intermittent operation mode. When the output voltage is less than 0.1V, the anolyte and catholyte are replaced. Initially set the concentration of phenol to 0.2g...

Embodiment 2

[0079] The difference between this embodiment and Example 1 is that nickel-loaded carbon felt is used as the cathode, and other steps are the same as Example 1. In this example, the Coulombic efficiency is 62.1%, the COD removal rate of coking wastewater is 63.5%, and the maximum output power density is 509mW / m 2 .

Embodiment 3

[0081] This embodiment is different from Example 1 in that a graphite brush is used as the cathode, and other steps are the same as in Example 1. In this example, the coulombic efficiency is 49.6%, the COD removal rate of coking wastewater is 52.6%, and the maximum output is 611mW / m 2 .

[0082] attached image 3 It is the relationship diagram of the output voltage with the acclimation time during the domestication process of phenol dominant bacteria, ammonia nitrogen dominant bacteria, sulfide dominant bacteria and cyanide dominant bacteria. When the output voltage is constant, it means that the biofilm is mature and the domestication of the strains is completed. The domestication time of phenol dominant bacteria is 705 hours, ammonia nitrogen dominant bacteria is 796 hours, sulfide dominant bacteria is 807 hours, and cyanide dominant bacteria is 729 hours.

[0083] attached Figure 4 The relationship between the output voltage and time during the acclimatization of coking...

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Abstract

The invention relates to a method for coking wastewater degradation and synchronous power generation by taking coking active bacterium as a biocatalyst. The method is carried out according to the following steps of partitioning a carbon-based active coking microbial film positive electrode and a platinum-loaded carbon fabric negative electrode at two chambers by using a cation membrane or a proton membrane; degrading organic matters and inorganic matters which are high in toxicity and are difficult to be degraded in coking wastewater in an anode anaerobic environment by using the coking active bacterium; allowing oxidation reaction; transferring electrons released through reaction to a positive carbon felt by a medium or a pigment secreted from the bacterium; sequentially transmitting the electrons to a negative electrode through an external wire; and allowing an electron acceptor of the negative electrode to generate reduction reaction. By the process, the treatment of high-toxicity and degradation-resistant coking wastewater is achieved, chemical energy reserved in the process is also converted to electrical energy, a new method is provided for coking wastewater treatment, and meanwhile, a wide prospect is provided for green treatment of the coking wastewater in future.

Description

technical field [0001] The present invention relates to a method for coking wastewater treatment, especially a method using active coking bacteria as a biocatalyst to degrade typical pollutants such as phenol, ammonia nitrogen, sulfide, and cyanide in coking wastewater by using microbial fuel cell technology, and at the same time decomposing all of them The method by which stored chemical energy is converted into electrical energy. Background technique [0002] China's total annual output of coke is as high as about 300 million tons, ranking first in the world. At the same time, a large amount of coking wastewater produced has caused great pollution to the environment. Coking wastewater is a high-concentration, toxic and harmful organic wastewater with complex components produced in the process of coking high-temperature dry distillation, coke quenching, gas purification and chemical product refining. Among them, the organic matter is mainly phenols, containing phenol and ...

Claims

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Application Information

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IPC IPC(8): H01M8/16
CPCH01M8/16Y02E60/50
Inventor 赵煜樊磊王俊文李婷梁镇海
Owner TAIYUAN UNIV OF TECH
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